I would like to know what size brass wire should I use when making the grab handles for my WWII Panther D early in 1/72nd scale.Thank you

Assume that the rod used for the real handles has a diameter somewhere between 15 - 25 millimetres. Dividing with 72 gives 0.2 to 0.35 millimetres. I think I would go for close to 0.2 with 0.25 millimetres as upper limit to allow some margin for paint thickness.

/Robin

Edit: This image: shows the side of the mantlet, supposed to be 100 mm thick and a grab handle on the drivers hatch. Comparing the sizes makes me think the handle is 12 - 13 mm thick

Similar with this image:

The side armour of the turret is 45 mm thick and the handle on the rear top edge of the turret seems to be about 0.3 x the armour thickness which would mean about 12 mm (and 0.17 mm in 1/72)